Rope-grip device.



G. R. HILL.

ROPE GRIP DEVICE. APPLloATIoN FILED DBO. 28, 1910.

l 1,0?5,567.` Patented 0015.14, 1913.

GEORGE R. HILL, OF PORTLAND, OREGON.

ROPE-GRIP DEVICE.

Application filed December 28, 1910.

Specification of Letters Patent.

Patented Oct. ist, MMS.

Serial No. 599,657.

T0 all whom may concern.'

lle it known that l, GEORGE Riot-IARD HILL, a citizen of the UnitedStates, and resident of the city of Portland, in the county of Multnomahand State of Oregon, have invented certain new and useful lmprovementsin Rope-Grip Devices, of which the following is a specification.

rlhis invention relates to grip devices for ropes of the class moreespecially adapted for use in the holding and raising and lowering ofportable scaffolding employed by painters and the like, although it isalso intended for all other purposes where it is desired to adjustablysecure a rope at given points under control of the user lts object is toprovide a device which shall be simple and durable in construction,cheap in first cost by reason of fewness and easy assemblage of parts,and efficient, positive and secure in operation.

To these ends, my invention consists in certain novel and usefulfeatures of construction and combinations of parts, all of which areherein set forth and illustrated in the accompanying drawings formingpart of this specification and in which similar letters of referenceindicate like parts.

In said drawings :iligure l is an elevation of one side of my deviceshowing the hoisting rope in its secured position. Fig. 2 is a similarview of the reverse side showing a rope attached to the hook of ahoisting-block by means of a loop, and extending downward through thetransverse guides. Fig. 3 is an edge view of the gripcasing. Fig. l is aplan view of Fig. l, without the rope.

A represents a block preferably cast integrally, of approximately ovalshape, having a central vertical channel a to receive the free end ofthe hoisting rope R, as seen in Fig. 1, and two transverse channels ai,a1, opening into the vertical channel a and through the side edges ofthe block. In each of these side channels al, is loosely fitted a dog Dhaving corrugations or serrations CZ upon their inner edges to bite orengage the rope and prevent same from slipping after being adjusted andset. These dogs are of such configuration as to beintegrally-counter-weighted in order to always normally engage the ropepassing between them, and are pivoted in the casing A through the mediumof studs P, P,

one for each, such studs having heads at one end and threads at theother, the latter being fitted with thumb-nuts T. A transverse plate B,preferably separate from the body of the block A, serves both as awasher for the studs l), and thumb-nuts T, and as a convenient means forretaining the rope R in the channel a. rlhe dogs D are each providedwith a post Z1 near their outer points, and each has an eye Z2 forengagement with a short chain C, fast to one eye and having a hook c forreleasable-connection with the opposite eye, as shown clearly in F ig.l, the purpose of this chain being to keep the dogs D up to their workand prevent them from flying up and thus relinquishing their grip uponthe rope at undesired times. Vllhen the adjustment of the rope is to bemade in raising or lowering a scaffold, or for finally releasing thesame, it

will be understood that the dogs D are released by throwing off the hookc.

Upon the reverse face of the block A, as shown in Fig. 2, I form twotransverse guides or loops G, G1, the upper one G heing preferablyshorter than the lower one marked G1 so as to conveniently receive andhold the two sections of the rope R1, which are looped through them, soas to enable the bend thereof to engage a hook H of any hoisting orsuspending tackle, while the free ends of said rope are connected to thescaffold which is to be raised or lowered.

rlhe operation of my invention is so simple and apparent from the abovedescription, and from the drawings, as to need no further description;and l wish it to be understood that l do not limit myself to the exactconstruction and configuration of parts, nor to their precise relativearrangement, as the same may be modified within the scope of theappended claims according to mechanical skill and judgment withoutdeparting from the essential principle or sacrificing any advantageaccruing from my invention.

What I claim and desire to secure by Letters Patent is as follows:

l. In a rope-grip device, a block channeled centrally and vertically forthe reception of a hoisting-rope, and also having transverse channelsopening from said central channel through the sides of said block; a dogwith a serrated edge loosely fitting into each of said transversechannels; the

serrated edges of said dogs serving as clamps to secure the rope in afixed vertical position between said dogs when the hoisting power isreleased from said rope; pivotal bearings on which said dogs rotate; oneend of saidfpivotal bearings projecting beyond one side of the block;said projecting portions being threaded; posts attached to and laterallyprojecting from points on the dogs remote from the serrated edges; meansattached to said posts to prevent accidental release of said dogs; atransverse plate detachably fastened to one side of the block; thumbnuts on the threaded projecting portion of the bearings to secure saidtransverse plate to the block, and means to attach the block to ascaffolding.

2. In a ropegrip device, a block channeled centrally and vertically forthe reception of a hoisting-rope; and also having transverse channelsopening from said central channel through the sides of said block; a dogwith a serrated edge loosely fitting into each of said transversechannels; the serrated edges of said dogs serving as clamps to securethe rope in a fixed position between said dogs when the hoisting poweris released from said rope; pivotal bearings on which said dogs rotate;one end of said pivotal bearings projecting beyond the sides of theblock; posts fastened to and projecting from points on the dogs at theopposite side of the pivotal bearings from the serrated edges of saiddogs; a chain connecting said posts; said chain serving to prevent thedogs from accidental release; a transverse plate detachably fastened toone side of the block; thumb nuts operating on the projecting ends tosecure the rope in a fixed position between said dogs when the hoistingpower is released fi'om said rope; pivotal bearings on which said dogsrotate; one end of said pivotal bearings projecting beyond the sides ofthe block; posts fastened to and projecting from points on the dogs atthe opposite side of the pivotal bearings from the serrated edges ofsaid dogs; eyes in said posts; a

chain with one end thereof permanently se-V cured to one of said eyesand tlie'other end detachably fastened to the opposite eye; said chainserving to prevent the dog from accidental release; a transverse platedetachably fastened to oneside of the block; thumb nuts operating on theprojecting ends of the pivotal bearings to secure o-r release saidtransverse plate for the purpose of inserting or removing ahoisting-rope, and means to attach the bloclr to a scaffolding.

In witness whereof, I have signed in the presence of the two subscribingwitnesses.

GEO. R. HILL.

Vitnesses:

PET-nr. HABERLIN, V. K. S'rRoDE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents; Washington, D. C.

